As a company, Amazon is entering a more mature phase.

作为一家公司，亚马逊正进入一个更加成熟的阶段。

Once they're done forming their matrix, these blast cells transition into a less active, mature phase.

一旦它们完成了它们的基质，这些成骨细胞就会进入一个不那么活跃的成熟阶段。